It will get deferred, much like depression medication. I had a bud in school way back when who was off depression meds for like 2-3 years and tried to get the same and it got denied.

Took about a year of constant mailings and doctor visits before they finally gave him the clearance to get a third class. It really depends on the AME you go to and the route that OKC takes. They have their "guidance" but I still see things done differently on separate occasions.